Toy building brick



FIG. 1 is a front top isometric view of a toy building brick showing my new design;

FIG. 2 is a bottom isometric rear view of the toy building brick;

FIG. 3 is a front side view of the toy building brick, a rear side view being a mirror thereof;

FIG. 4 is a top view of the toy building brick;

FIG. 5 is a bottom view of the toy building brick; and,

FIG. 6 is a top isometric view of the toy building brick.

The broken lines are for the purpose of illustrating portions of the article that form no part of the claim. 

CLAIM The ornamental design for a toy building brick, as shown and described. 